1 Scope
This standard specifies terms and definitions, types and basic parameters, requirements, inspection methods as well as marking and packaging, etc. of external micrometer (including external micrometer with counter).
This standard is applicable to the external micrometer with division values of 0.001 mm, 0.002 mm and 0.005 mm, and with the upper limit of measuring range of 1000 mm.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.
GB/T 17163-1997 Terms of Measuring Instrument for Geometrical Quantity - Basic Terms
3 Terms and Definitions
For the purposes of this standard, the terms and definitions specified in GB/T 17163-1997 and those listed below apply.
3.1
external micrometer
the external dimension measuring instrument for reading the distance between two measurement planes of the scale holder by making use of the screw pair principle
3.2
external micrometer with counter
the external dimension measuring instrument for reading the distance between two measurement planes of the scale holder with mechanically digital display device by making use of the screw pair principle
Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Types and Basic Parameters
5 Requirements
6 Inspection Method
7 Marking and Packaging
Annex A (Normative) Axial Endplay and Radial Wobble
Annex B (Informative) Deviation of Measurement Planes
